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on september 25, the paper (www.thepaper.cn) learned from the jinhua management center of zhejiang transportation group expressway that after six months of trial operation, the "lights follow the car" intelligent lighting system independently developed by the center was officially put into use on the 24th in the mukeli tunnel of the jinhua expressway under construction, becoming the province's first intelligent lighting system for expressway tunnels.

mukeli tunnel of jianjin expressway

highway tunnels have a special structure, relatively closed passage space, and relatively complex passage conditions. how to better operate highway tunnels safely and efficiently has always been a top priority of road management.

according to he xiaoqiang, deputy director of the mechanical and electrical department of jinhua management center, the "lights follow the car" intelligent lighting system integrates the internet of things, cloud computing, brightness detectors, and millimeter-wave radar, license plate capture, geomagnetic induction, event detection "four-in-one" vehicle tracking and identification system and other equipment and facilities and new generation information technology. it adopts the "brightness intelligent adaptation + car-following lighting" intelligent lighting mode based on factors such as traffic flow, speed, weather and light, and realizes the segmented precise control of tunnel lighting of "lights turn on when the car comes - lights go off when the car leaves - lights follow the car".

the mukeli tunnel of jianjin expressway is 2,594 meters long. he xiaoqiang introduced that when the vehicle travels to 300 meters before the tunnel entrance, the "four-in-one" vehicle tracking and identification system automatically captures the vehicle's traffic information. through the internet of things transmission, cloud computing, and artificial intelligence analysis, the "lights follow the car" intelligent lighting system immediately adjusts the front lighting brightness in the tunnel to ensure that the vehicle enters the tunnel safely. as the vehicle moves forward in the tunnel, the millimeter-wave radar set every 60 meters will track the vehicle's driving trajectory in real time, and dynamically adjust the lighting space in front and behind the vehicle according to the speed until the vehicle safely exits the tunnel. when no vehicle passes, the system automatically adjusts the light brightness to meet the minimum standard requirements for highway tunnel lighting, helping to reduce costs and increase efficiency. the commissioning of this system effectively solves the problems of high energy consumption and unsatisfactory light environment of traditional tunnel lighting, avoids "ineffective lighting" and "excessive lighting", and achieves an annual energy saving ratio of 35%.